Description
Polycarp is a music editor at the radio station. He received a playlist for tomorrow, that can be represented as a sequence a1, a2, ..., an, where ai is a band, which performs the i-th song. Polycarp likes bands with the numbers from 1 to m, but he doesn't really like others.
We define as bj the number of songs the group j is going to perform tomorrow. Polycarp wants to change the playlist in such a way that the minimum among the numbers b1, b2, ..., bm will be as large as possible.
Find this maximum possible value of the minimum among the bj (1 ≤ j ≤ m), and the minimum number of changes in the playlist Polycarp needs to make to achieve it. One change in the playlist is a replacement of the performer of the i-th song with any other group.
The first line of the input contains two integers n and m (1 ≤ m ≤ n ≤ 2000).
The second line contains n integers a1, a2, ..., an (1 ≤ ai ≤ 109), where ai is the performer of the i-th song.
In the first line print two integers: the maximum possible value of the minimum among the bj (1 ≤ j ≤ m), where bj is the number of songs in the changed playlist performed by the j-th band, and the minimum number of changes in the playlist Polycarp needs to make.
In the second line print the changed playlist.
If there are multiple answers, print any of them.
4 2
1 2 3 2
2 1
1 2 1 2
7 3
1 3 2 2 2 2 1
2 1
1 3 3 2 2 2 1
4 4
1000000000 100 7 1000000000
1 4
1 2 3 4
In the first sample, after Polycarp's changes the first band performs two songs (b1 = 2), and the second band also performs two songs (b2 = 2). Thus, the minimum of these values equals to 2. It is impossible to achieve a higher minimum value by any changes in the playlist.
In the second sample, after Polycarp's changes the first band performs two songs (b1 = 2), the second band performs three songs (b2 = 3), and the third band also performs two songs (b3 = 2). Thus, the best minimum value is 2.
正解:贪心
解题报告:
最优的次数显然,方案的话,每次暴力找到一个多余的,并把多出来的部分给别的缺少的即可。
1 //It is made by jump~ 2 #include <iostream> 3 #include <cstdlib> 4 #include <cstring> 5 #include <cstdio> 6 #include <cmath> 7 #include <algorithm> 8 #include <ctime> 9 #include <vector> 10 #include <queue> 11 #include <map> 12 #include <set> 13 using namespace std; 14 typedef long long LL; 15 const int inf = (1<<30); 16 const int MAXN = 2011; 17 int n,m,ans,zong; 18 int a[MAXN],cnt[MAXN]; 19 bool pd[MAXN]; 20 21 inline int getint() 22 { 23 int w=0,q=0; char c=getchar(); 24 while((c<'0' || c>'9') && c!='-') c=getchar(); if(c=='-') q=1,c=getchar(); 25 while (c>='0' && c<='9') w=w*10+c-'0', c=getchar(); return q ? -w : w; 26 } 27 28 inline void work(){ 29 n=getint(); m=getint(); for(int i=1;i<=n;i++) a[i]=getint(); 30 for(int i=1;i<=n;i++) if(a[i]<=m) cnt[a[i]]++; 31 ans=n/m; printf("%d ",ans); bool flag=false; 32 for(int i=1;i<=n;i++) { 33 if(a[i]<=m && cnt[a[i]]>ans) { 34 flag=false; 35 for(int j=1;j<=m;j++) { 36 if(cnt[j]<ans) { 37 flag=true; 38 cnt[j]++; cnt[a[i]]--;a[i]=j; break; 39 } 40 } 41 if(flag) zong++; 42 } 43 else if(a[i]>m) { 44 flag=false; 45 for(int j=1;j<=m;j++) { 46 if(cnt[j]<ans) { 47 flag=true; 48 cnt[j]++; a[i]=j; 49 break; 50 } 51 } 52 if(flag) zong++; 53 } 54 } 55 printf("%d ",zong); 56 for(int i=1;i<=n;i++) printf("%d ",a[i]); 57 } 58 59 int main() 60 { 61 work(); 62 return 0; 63 }